Fuse-block.



,234,544. 7 Patented July 24, 1917.

n, c. HOOKER.

FUSE BLOCK.

APPLIICATKON FILED JULY 1. 19m.

IN VENTOR.

Arron Nay.

UNITED STATES PATENT OFFICE.

DUNCAN C. HOOKER, OF FARMINGTON, CONNECTICUT, ASSIGNOR TO THEJOHNS-PRATT COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OFCONNECTICUT.

FUSE-BLOCK.

Application filed July 1, 1916.

To all whom it may concern:

Be it known that I, DUNoAN C. HOOKER, a citizen of the United States,residing at Farmington, in the county of Hartford and State ofConnecticut, have invented a new and useful Improvement in Fuse-Blocks,of which the following is a specification.

This invention relates to the conductors on a fuse block which areemployed for elec trically connecting the wire terminals with the fuseterminals.

The object of the invention is to provide a fuse block with very simpleand cheap conducting means which are easily manipulated and which willefficiently connect the wire terminals and the fuse terminals.

The invention is particularly adapted for fuse'blocks designed toreceive fuses of relatively large capacity, for instance, fuses of 100ampere and upward rated capacity, whichduses at the present timecommonly have knife blade terminals.

Figure 1 of the accompanying drawings shows a side elevation of a fuseblock having spring clips for receiving fuse terminals of the knifeblade type and provided with socketed lugs for receiving the wireterminals', which clips and lugs are constructed and connected inaccordance with the present invention. Fig. 2 shows a plan of the same.Fig. 3 shows a vertical transverse section taken on the plane indicatedby the dotted line on Fig. and looking in the direction indicated by thearrows. Fig. at is a perspective view showing one end of the insulatingbase with one of the metal wire lugs placed thereon.

' The base 1 of the block is preferably a piece of porcelain, slate orsimilar insulat' ing material. Projecting upwardly from the base neareach end are two screws, belts or threaded studs 2. These screws aredesirably staggered and are fixed so "they will not turn. The bottoms 3of the spring clips 4, which are designed to receive knife bladeterminals of a fuse, have perforations so that they may be set down.upon the upper face of the base with the screws projecting upwardly intothem. After the spring clips have been placed on the base over thescrews nuts 5 are turned on the screws.

Before the nuts are turned down tightly the flattened ends 6 of thesocketed wire terminal lugs 7 are slipped in between the Specificationof Letters Patent.

Patented July 24, 1917.

Serial No. 107,018.

upper surface of the base and the under surface of the bottom of thespring clips, slots 8 being desirably cut diagonally in the flat ends ofthe wire lugs to permit this. After the wire lugs have been placed inposition the nuts are turned down on the screws so as to tightly clampthe clips down on the lugs and secure the parts to ether.

\Vhen it is desired to asten wile terminals in the sockets of the lugsthe nuts are loosened and the lugs withdrawn. After the wire terminalshave been soldered into the lug sockets the flat portions of the lugsare slipped'onto the block beneath the clips and the nuts tightened.These devices may be packed in a small space for shipment by looseningthe nuts and reversing the In so that they will occupy the positionsfilustrated by the dotted lines in Fig. 1. The lugs may be cast or theymay, as shown, be formed of sections of tubing with portions flattened.There are a minimum number of conducting parts to this block and maximumcontact is provided between the lugs. to which the wire terminals aresecured andthe spring clips whichare'desi' ed to-receive the knife bladeterminals 0 the fuse, thus insuring efliciency of action at a low cost.

The invention claimed is: y

1. A fuse block having a base, spring clips with screw openings mountedon the base, wire lugs with flattened ends provided with oblique slotsin electrical contact with the spring clips, and screws passingthroughthe openings in the clips and slots in the 111 s and into basefor clamping the clips and tfie lugs together and to the base.

2. .A fuse block having an insulatin base,

spring clips with perforations-in then bottoms mounted on the base,socketed wire lugs with slotted flat portions located between the uppersurface of the base and the bottoms of the spring clips, andserewspassing through the base, the slots in the flattoned portions ofthe lugs and the perforations in the bottoms of the clips for clampingthe clips down upon the fiat portions of the wire lugs and holding theparts together. upon the base.

3. A fuse block having an insulating basef, spring clips with openingsthrou h the" bottoms and sides mounted upon t e b wire 1 s with slottedportions located be tween 1; 0 upper surface of the base ma the withoblique slots located on the neath the bottoms of the sprin bottomsofthe spring clips, screws projecting upwardly from the base through theslots in the lugs and openings in the bottoms of the spring clips, andnuts turning upon the screws and exposed throu h the o enings in thesides of the spring cllps for c limping the clips down upon the wirelugs.

4. A-fuse block having a base, spring clips mounted on the base, screwspro]ecting upwardl from the base into the spring cIi s, wire ugs withflattened sections roVi ed ase beclips, and nuts turning on the screwsfor c amping the clips down upon the flattened portions of the wirelugs.

5. A fuse block having an insulating base, two screws projectingupwardly near each end of the base, sprin clips located on the uppersurface of the ase over the screws, socketed wire lugs with flattenedends having oblique slots inserted between the baseand the spring clips,screws for clamping the clips down upon the flattened portions of theWire lugs, or releasing the flattened portions of the Wire lugs frombetween the base and the clips.

DUNCAN C. HOOKER.

and nuts turning on the

